package zhouce;

import java.util.Random;

public class Demo01 {

public static void method(){
	int sum =0;
		char[] ch = {'a','b','c','d','e','f','g','h','i','j','k'};
        for(int i = 0;i<12;i++) {
        	Random ran = new Random();
        	int a = ran.nextInt(11);
        	i=a;
        	sum+=1;
        	System.out.println(ch[i]);
        	if(sum==4) {
        		break;
        	}
        }
        
	}
public static void main(String[] args) {
	method();
}
}
